Compounds that participate in cooperative binding and uses thereof
A technology of compounds and macrocyclic compounds, applied in medical preparations with non-active ingredients, medical preparations containing active ingredients, organic chemistry, etc., can solve insurmountable problems
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Embodiment 1
[0527] Example 1. General Fermentation and Isolation Protocol
[0528] Compounds synthesized by bacterial strains can be fermented and isolated using the following general protocol:
[0529] General Fermentation Protocol
[0530] Strains: Bacterial strains such as Streptomyces malaysiensis DSM41697, other producing strains or genetically modified derivatives that produce FKBP ligands (for example: F1, F2, F3 or structurally similar compounds and their analogs) on solid culture Propagate aseptically on a substrate (eg ISP4).
[0531] Working Cell Bank: Use spores or mycelia produced from cultures grown on solid media plates for 3-14 days at 30°C to inoculate liquid cultures (eg: 40ml ATCC172 broth in a 250ml Erlenmeyer flask ). The culture was incubated at 30°C with shaking for 2-3 days. The resulting cell suspension was mixed with sterile 50% glycerol to obtain a mixture with a final concentration of 15-25% glycerol. Aliquots (approximately 1 ml) of the glycerol-mycelium ...
Embodiment 2
[0562] The separation of embodiment 2.F2 and F3
[0563] F1 (target mass 595), F2 (target mass 609) and compound 3 (target mass 623) Streptomyces malaysian fermentation broth (NRRL B-24313; ATCC BAA-13; DSM 41697; JCM 10672; KCTC9934) were produced by centrifugation in 10 L ; NBRC 16446; CGMCC 4.1900; IFO 16448). F1 and F2 are present in clarified fermentation broth and microbial pellets. The target compound in the supernatant was extracted once with EtOAc at a volume ratio (1:1, v / v). The precipitate was extracted 3 times with 1.5 L of EtOAc-MeOH (9:1, v / v), and each extraction was stirred for 1 h-1.5 h with an overhead stirrer. The organic extracts were filtered through celite. The combined filtrates were evaporated at 35°C until dryness, yielding approximately 30 g of crude extract. The residue was then dissolved in 90 mL of DCM-THF (80:20, v / v), and 60 g of silica gel was added thereto and dried under vacuum at 35°C. The dried residue / silica mixture was loaded onto a ...
Embodiment 3
[0568] The separation of embodiment 3.F22
[0569] 10 L of the fermentation broth produced by the recombinant strain S1806 was centrifuged to obtain a pellet and a supernatant. The particles were extracted 3 times with 1.5LEtOAc-MeOH (9:1, v / v). The organic solvents were combined and concentrated in vacuo to obtain 1.8 g of crude extract. 2 mL of heptane-THF (4:1, v / v) was added thereto for dissolution, and then 2 g of Celite was added to obtain a dry mixture after solvent removal on a rotary evaporator at 30°C. The dried residue / celite mixture was loaded onto a 40 g RediSep silica gold cartridge for column chromatography. The compound was fractionated at 20 mL / min eluting with a linear gradient from 100% n-heptane to 40% EtOAc in heptane (v / v) over 25 min, collecting 50 mL of each fraction. F22 (target mass 607) was mainly enriched in fraction 14 identified by LC-MS analysis. Fraction 14 was then dried under vacuum at 30°C to give 17.8 mg of solid material which was furth...
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